A Novel Integrated Step-Up Hybrid Converter With Wide Conversion Ratio

摘要

In this paper, a novel topology combining reconfigurability and hybridization is presented. Reconfigurability allows the proposed converter to operate in three different operating modes, yielding a wide range of step-up conversion ratios. The combination of two charge-pump cells and an inductor allows to reduce the average inductor current if compared to a standard equivalent boost converter. A prototype with integrated MOS, drivers, and logic but external passives was built. Experimental results show that with f(s) = 300 kHz, V-in = 6V, and I-o = 70 mA, the converter can cover conversion ratios in the range from 2.5 to 10, with a maximum output voltage equal to 60 V. Peak efficiency is 91%. When the output current is increased to 100 mA peak efficiency is 92.8%.